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Senior iOS Software Engineer

Duolingo

Software and Technology Jobs

Senior iOS Software Engineer

full-timePosted: Dec 2, 2025

Job Description

Our mission at Duolingo is to develop the best education in the world and make it universally available. It’s a big mission, and that’s where you come in!

At Duolingo, you’ll join a team that cares about finding innovative solutions to complex technical problems, running countless experiments (300+ at a time!) with our massive user base to make data-driven decisions, and educating our users and employees alike. You’ll have limitless learning opportunities, mentorship and collaboration with world-class minds, and a variety of projects with large scopes — while doing work that’s both fun and meaningful. 

Join our life-changing mission to develop education for our half a billion (and growing!) learners around the world.


About the role

Math Team

As an iOS engineer on the Math team, you will help build the technology that changes how people around the world learn Math. The features that you ship will help learners to develop core math skills in a fun, engaging way. We’re looking for engineers who love building new products and features.

 

:brain:  You will...

  • Collaborate on software projects with product design and backend aspects
  • Develop, release, and maintain native iOS applications, primarily in Swift
  • Mentor and set technical direction for junior engineers across the company

 

:check:  You have...

  • A Bachelor’s degree in Computer Science or a related technical field
  • A solid foundation in computer science with strong competencies in data structures, algorithms, and software design
  • Programming experience in Swift

 

:star:  Exceptional candidates will have...

  • Strong proficiency in Swift, with proven ability to build and maintain production-level applications
  • Strong technical knowledge of iOS mobile application development for iPhone/iPad using Swift with Cocoa Touch and related frameworks
  • Experience designing clean and maintainable APIs
  • Experience with multithreaded programming
  • Experience writing unit tests and testable code
  • Knowledge of iOS SDK performance tools and optimization techniques

 


We post a multi-level salary range for all of our roles.

This is not inclusive of the rest of our awesome portfolio that includes equity compensation and world-class benefits. Our salary ranges are the same for all US locations. Your recruiter can share more details about the range for a specific level during the hiring process. The actual salary within the range is determined by many factors including but not limited to, skills, experience, education, and internal equity.

Salary Range:
$177,700$240,400 USD

Take a peek at how we care for our employees' holistic well-being with our benefits here.

We will do everything we can within reason to make sure that your interview takes place in an environment that fairly and accurately assesses your skills. If you need assistance or accommodation, please contact accommodations@duolingo.com.

Duolingo is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.

By applying for this position your data will be processed as per the Duolingo Applicant Privacy Notice.

Sign up for job alerts here.

Locations

  • New York, New York, United States

Salary

Salary details available upon request

Estimated Salary Rangemedium confidence

180,000 - 300,000 USD / yearly

Source: ai estimated

* This is an estimated range based on market data and may vary based on experience and qualifications.

Skills Required

  • data structuresintermediate
  • algorithmsintermediate
  • software designintermediate
  • Swiftintermediate
  • iOS developmentintermediate
  • Cocoa Touchintermediate
  • APIsintermediate
  • multithreaded programmingintermediate
  • unit testsintermediate
  • iOS SDK performance toolsintermediate

Required Qualifications

  • A Bachelor’s degree in Computer Science or a related technical field (experience)
  • A solid foundation in computer science with strong competencies in data structures, algorithms, and software design (experience)
  • Programming experience in Swift (experience)

Preferred Qualifications

  • Strong proficiency in Swift, with proven ability to build and maintain production-level applications (experience)
  • Strong technical knowledge of iOS mobile application development for iPhone/iPad using Swift with Cocoa Touch and related frameworks (experience)
  • Experience designing clean and maintainable APIs (experience)
  • Experience with multithreaded programming (experience)
  • Experience writing unit tests and testable code (experience)
  • Knowledge of iOS SDK performance tools and optimization techniques (experience)

Responsibilities

  • Collaborate on software projects with product design and backend aspects
  • Develop, release, and maintain native iOS applications, primarily in Swift
  • Mentor and set technical direction for junior engineers across the company

Benefits

  • general: equity compensation
  • general: world-class benefits

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Duolingo logo

Senior iOS Software Engineer

Duolingo

Software and Technology Jobs

Senior iOS Software Engineer

full-timePosted: Dec 2, 2025

Job Description

Our mission at Duolingo is to develop the best education in the world and make it universally available. It’s a big mission, and that’s where you come in!

At Duolingo, you’ll join a team that cares about finding innovative solutions to complex technical problems, running countless experiments (300+ at a time!) with our massive user base to make data-driven decisions, and educating our users and employees alike. You’ll have limitless learning opportunities, mentorship and collaboration with world-class minds, and a variety of projects with large scopes — while doing work that’s both fun and meaningful. 

Join our life-changing mission to develop education for our half a billion (and growing!) learners around the world.


About the role

Math Team

As an iOS engineer on the Math team, you will help build the technology that changes how people around the world learn Math. The features that you ship will help learners to develop core math skills in a fun, engaging way. We’re looking for engineers who love building new products and features.

 

:brain:  You will...

  • Collaborate on software projects with product design and backend aspects
  • Develop, release, and maintain native iOS applications, primarily in Swift
  • Mentor and set technical direction for junior engineers across the company

 

:check:  You have...

  • A Bachelor’s degree in Computer Science or a related technical field
  • A solid foundation in computer science with strong competencies in data structures, algorithms, and software design
  • Programming experience in Swift

 

:star:  Exceptional candidates will have...

  • Strong proficiency in Swift, with proven ability to build and maintain production-level applications
  • Strong technical knowledge of iOS mobile application development for iPhone/iPad using Swift with Cocoa Touch and related frameworks
  • Experience designing clean and maintainable APIs
  • Experience with multithreaded programming
  • Experience writing unit tests and testable code
  • Knowledge of iOS SDK performance tools and optimization techniques

 


We post a multi-level salary range for all of our roles.

This is not inclusive of the rest of our awesome portfolio that includes equity compensation and world-class benefits. Our salary ranges are the same for all US locations. Your recruiter can share more details about the range for a specific level during the hiring process. The actual salary within the range is determined by many factors including but not limited to, skills, experience, education, and internal equity.

Salary Range:
$177,700$240,400 USD

Take a peek at how we care for our employees' holistic well-being with our benefits here.

We will do everything we can within reason to make sure that your interview takes place in an environment that fairly and accurately assesses your skills. If you need assistance or accommodation, please contact accommodations@duolingo.com.

Duolingo is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.

By applying for this position your data will be processed as per the Duolingo Applicant Privacy Notice.

Sign up for job alerts here.

Locations

  • New York, New York, United States

Salary

Salary details available upon request

Estimated Salary Rangemedium confidence

180,000 - 300,000 USD / yearly

Source: ai estimated

* This is an estimated range based on market data and may vary based on experience and qualifications.

Skills Required

  • data structuresintermediate
  • algorithmsintermediate
  • software designintermediate
  • Swiftintermediate
  • iOS developmentintermediate
  • Cocoa Touchintermediate
  • APIsintermediate
  • multithreaded programmingintermediate
  • unit testsintermediate
  • iOS SDK performance toolsintermediate

Required Qualifications

  • A Bachelor’s degree in Computer Science or a related technical field (experience)
  • A solid foundation in computer science with strong competencies in data structures, algorithms, and software design (experience)
  • Programming experience in Swift (experience)

Preferred Qualifications

  • Strong proficiency in Swift, with proven ability to build and maintain production-level applications (experience)
  • Strong technical knowledge of iOS mobile application development for iPhone/iPad using Swift with Cocoa Touch and related frameworks (experience)
  • Experience designing clean and maintainable APIs (experience)
  • Experience with multithreaded programming (experience)
  • Experience writing unit tests and testable code (experience)
  • Knowledge of iOS SDK performance tools and optimization techniques (experience)

Responsibilities

  • Collaborate on software projects with product design and backend aspects
  • Develop, release, and maintain native iOS applications, primarily in Swift
  • Mentor and set technical direction for junior engineers across the company

Benefits

  • general: equity compensation
  • general: world-class benefits

Target Your Resume for "Senior iOS Software Engineer" , Duolingo

Get personalized recommendations to optimize your resume specifically for Senior iOS Software Engineer. Takes only 15 seconds!

AI-powered keyword optimization
Skills matching & gap analysis
Experience alignment suggestions

Check Your ATS Score for "Senior iOS Software Engineer" , Duolingo

Find out how well your resume matches this job's requirements. Get comprehensive analysis including ATS compatibility, keyword matching, skill gaps, and personalized recommendations.

ATS compatibility check
Keyword optimization analysis
Skill matching & gap identification
Format & readability score

Tags & Categories

EngineeringEngineering

Answer 10 quick questions to check your fit for Senior iOS Software Engineer @ Duolingo.

Quiz Challenge
10 Questions
~2 Minutes
Instant Score

Related Books and Jobs

No related jobs found at the moment.